Mixing-valve.



E. J. SIEBER.

.MIXING VALVE.

7 APPLICATION FILED NOV. 30, I914- a 1,203,798. Patented Nov. 7, 1916.

' 2 SHEETS-SHEET 2.

2 FIG-5. 8 5

. 6a ll- 1 G) N I I l I 5 J"- V a |||||l|]l.\ M11111 WITNESSES M74, I w fi/LNVENTOR ERNEST J. SIEBER, OF ROSS TOWNSHIP, ALLEGHENY COUNTY, PENNSYLVANIA,

ASSIGNOR TO STANDARD SANITARY MANUFACTURING COMPANY, OF PITTS- BURGH, PENNSYLVANIA, A CORPORATION OF JERSEY.

MIXING-VALVE.

Specification of Letters Batent.

Patented Nov. '7, 1916.

Application filed November 30, 1914. Serial No. 874,739.

' citizen of the United States, have invented or discovered certain new and useful Improvements ln'Mixlng-valves, of which improvements the following is a specification. My invention relates to mlxing valves, and, while not limlted to any specific purpose, is particularly adapted to be used for mixing hot and cold water and for regulat ing its temperature for baths and like purposes.

The object ,of my invention is to provide a mixingvalve having increased efliciency and of improved construction and operation. 7

A further object is to provide such a valve comprising a small number of movable parts, which, neither because of inherent construction nor wear of service, will rattle or hammer when the valve is open.

One embodiment of my invention is illustrated in the accompanying sheets of'draw- I ings which form partjof my specification.

Figure 1 is a face view of the valve and pipes connected to it; Fig. 2 a combined elevation and sectional view, the plane of view being taken on the broken line 11-11, Fig. 1; Fig. 3 a sectional view taken on the line IIIIII, Fig. 2; Fig. 4 a face or plan view of theintegral valve casing with all the operating and attachedparts removed; and Fig. 5 a sectional view taken on the line V-V, Fig. 4.

In the several figures like numerals are used to designate like parts.

The essential elements of the valve .construction consist of a casing affording inlet chambers and an outlet and mixing chamber communicating by ports withthe inlet chambers, valve members for opening and closing the ports and for varying with rela tion to each other, the quantities of fluid flowing through the ports, and means for operating the valve members. The valve casing .1, in the presentembodiment of my invention, is cylindrical and is provided interiorly with walls 2 and 2? which divide the easing into inlet chambers 3 and 3" and an outlet and mixing chamber 4, the inlet chambers being on opposite sides of the center of the casing. The inlet chambers communicate with the outlet chamber by means of ports 5 and 5 and the several chambers 3, 3 and 4 are provided with pipe connection openings 6, 6 and 7, respectively. The casing is further provided with guideways 8 and 8*, above and in line with the ports 5. and 5 and preferably cylindrical in form adjacent to the ports but incomplete cylinders near the open side of the casing. Between the truly cylindrical portions of the guideways, and centrally disposed within the casing, there is a bearing 9 to support the valve operating member, as will be fully explained hereinafter. The casing as thus described is an integral casting of any suitable material.

As stated above, the .valve members for the ports 5 and 5 are effective in the first place to close the ports when the valve is in closed position, and in the second place to vary, with relation to each other, the quantities of fluid flowing through the ports when the valve is opened. For these purposes they are preferably two-part members consisting of stems 11 and 11 mounted in the guideways 8 and 8*, respectively, the lower ends'of such stems being adapted to seat upon the rims of the ports, and graduated plugs 10 and 10 securedto the stems and projecting through the ports. The plugs may be of any suitable construction to the end that, as they are simultaneously moved through their ports, the quantity of fluid passing through one port will be gradually increased, while that passing through the other will be gradually decreased. As shown herein, the plugs are oppositely tapered, and when the mixing valve is used for hot and cold water,.the plug 10 will be for the cold water and 10 for the hot water shown in Fig. 3 the disk 14 is provided with four threads the pitch of which is such that the valve members may, by giving the spindle less than a complete turn, be moved through their permissible range of travel. The operating member is rotatable, but is held against longitudinal movement on the one side by the bearing support 9 and on the other side by a cover 15, secured tothe casing as by screws 16. To give the structure a neat appearance, a suitable canopy or second cover 17 may extend over the front of the casing and be clamped between nuts 18 and 19, as clearly shown in Fig. 2. In order to properly adjust the extent of the movement of the valve members, a suitable set or stop screw 23 may be inserted in the end of one of the valve members, and the extent of its projection above the top of the spindle may be regulated by first removing a screw 24 from the cover 15 and then inserting a suitable screw driver through the opening in the cover, as will be understood from Fig. 2. When installed the inlet chambers 3 and 3 are placed in communication with sources of fluid supply by means of inlet pipes 20 and 20, and a third pipe 21 leads from outlet chamber 4, as seen in Fig. 1.

In operation, assuming the parts to be in the positions indicated in Fig. 2, by turning a handle 22 secured to the spindle 13, the valve stems 11 and 11 will be caused to slide along their guideways 8 and 8. Thus the plugs 10 and 10 will move through their ports 6 and 6 ;respectively,'-; thereby permittingthe fluids to; enter the outlet chamber and be 1nixed therein in the well known niannerw Because of the rigid"construction' of the valve members-,:- including. thefiplugs and stems, and the direct threadedr'engagement or'upon its intended control of thevalveguides with the disk 14, it'will be seen that there canbe-norattlingor ham meringrof the valve memberszi Furthermore the relatively large bearing or .'.conta'ct sun faces or the movable parts, made possible by my, improved construction,:materially disposed inlet chambers, a mixing and outlet g "BLANCHE MGGARTm chamber communicating by ports with the inlet chambers, and guideways for valve members; a pair of valve members unconnected to each other'and comprising oppositely graduated plugs adapted to control flow through said ports, and stems secured to said plugs and movable in said guideways, the adjacently disposed faces of said stems being provided with screw threads; and a rotatably mounted operating spindle having a laterally-projecting exteriorly-threaded disk engaging said threaded faces of the stems.

2. In a mixing valve, the combination of a casing comprising a pair of oppositely disposed inlet chambers, a mixing and outlet chamber communicating by valve controlled ports with the inlet chambers, and guideways for valve members; a pair of valve members unconnected to each other and comprising oppositely graduated plugs adapted to control flow to said ports, and stems secured to said plugs and movable in said guideways, the adjacently disposed faces of said stems being provided with screw threads the general planes of which substantially coincide with the longitudinal axes of said plugs; and a rotatably mounted operating spindle having a laterally proj ecting exteriorly-threaded disk engaging said threaded faces of the stems.

3. In a mixing valve, the combination of an integrally formed cylindrical casing member comprising inlet chambers, a mixing and outlet chamber communicating by ports with the inlet chambers, oppositely disposed guideways" for valve stems and" a centrally disposed bearing support-for "an operating spindleg valve members at" opposite sides ofthe center ofthe-casing and comg prising oppositely'tapered plugs projecting through" said ports and. stems -slidably mounted in-said gui eways and adapted to close said ports,- saidplugsbeing rigidly connected to theistems,and the valveguides having concave' interiorly facing surfaces provided with screw threads; arr-operating spindle having its' inner fendfro'tatably mounted in said bearing support and having asran integral part't'here-of a la terally proj ecting diskprovided with screw threads engagin'gthose of saidivalve stems and'a cover securedtoisaid casing,- saidoperating member: being held' f against longitudinal movement by {said bearingsupport "and In testimony whereof Ihave hereunto set myhand. o 1

ERNE$TJ;SIEBER. :Witnesses: 'GEOQA. YOUNG,

Gop-iesof this patent may be obtained. for-five-cents each, by addressing thefifiommissione'r of Patents,

washington, I); ('1 y: 

